This article guides you through the process of claiming an item you purchased in the shop, regardless of whether the purchase was made in the Gala Store or in-game shops.
Assumptions Made

This article assumes you understand the information in the following articles:

Getting Started in Champions Arena

Summary

1) Open Champions Arena, click the hamburger menu icon and choose DELIVERY.

2) Tap Receive by mail.

3) Go back to the game lobby and click the mail icon.

Select PURCHASE.

4) Click on RECEIVE or COLLECT ALL if you have multiple purchases.